docs: def com_google_fonts_check_gasp(ttFont):
    """Is 'gasp' table set to optimize rendering?"""
  
    if "gasp" not in ttFont.keys():
      yield FAIL, ("Font is missing the 'gasp' table."
                   " Try exporting the font with autohinting enabled.")
    else:
      if not isinstance(ttFont["gasp"].gaspRange, dict):
        yield FAIL, "'gasp' table has no values."
      else:
        failed = False
        if 0xFFFF not in ttFont["gasp"].gaspRange:
          yield WARN, ("'gasp' table does not have an entry for all"
                       " font sizes (gaspRange 0xFFFF).")
        else:
          gasp_meaning = {
            0x01: "- Use gridfitting",
            0x02: "- Use grayscale rendering",
            0x04: "- Use gridfitting with ClearType symmetric smoothing",
            0x08: "- Use smoothing along multiple axes with ClearType®"
          }
          table = []
          for key in ttFont["gasp"].gaspRange.keys():
            value = ttFont["gasp"].gaspRange[key]
            meaning = []
            for flag, info in gasp_meaning.items():
              if value & flag:
                meaning.append(info)
  
            meaning = "\n\t".join(meaning)
            table.append(f"PPM <= {key}:\n\tflag = 0x{value:02X}\n\t{meaning}")
  
          table = "\n".join(table)
          yield INFO, ("These are the ppm ranges declared on the"
                      f" gasp table:\n\n{table}\n")
  
          for key in ttFont["gasp"].gaspRange.keys():
            if key != 0xFFFF:
              yield WARN, ("'gasp' table has a gaspRange of {} that"
                           " may be unneccessary.").format(key)
              failed = True
            else:
              value = ttFont["gasp"].gaspRange[0xFFFF]
              if value != 0x0F:
                failed = True
                yield WARN, (f"gaspRange 0xFFFF value 0x{value:02X}"
                              " should be set to 0x0F.")
          if not failed:
            yield PASS, ("'gasp' table is correctly set, with one "
                         "gaspRange:value of 0xFFFF:0x0F.")